1. The utility model provides a screw length detection mechanism which characterized in that: the automatic feeding device comprises a detection mechanism (8), a receiving mechanism and a conveying mechanism for conveying a clamping screw to the detection mechanism (8), wherein the detection mechanism (8) is provided with a clamping mechanism (7) for accommodating the screw to pass through, the detection mechanism (8) comprises a shell (9), an upper tooth post (10) and a lower tooth post (12) which are connected with the shell (9) in a sliding manner, the shell (9) is provided with a pressure spring (22) which is abutted against the lower tooth post (12), the shell (9) is provided with a movable space for accommodating the lower tooth post (12) in a rotating manner, the shell (9) is provided with a plurality of limiting parts (18) which guide the upper tooth post (10) and the lower tooth post (12) to slide up and down and block the lower tooth post (12) in a rotating manner, the lower tooth post (12) is provided with a lower tooth surface (17), the upper tooth post (10) is provided with an upper tooth surface (15) which can be abutted against the lower tooth surface (17), and the limiting parts (18) are provided with inclined surfaces which are clamped with the lower tooth surface (17), the lower tooth post (12) is distributed to form a plurality of conversion parts according to the limiting parts (18), the conveying mechanism drives the screw to intermittently push the upper tooth post (10) to abut against the lower tooth post (12), the upper tooth post (10) drives the lower tooth post (12) to exceed the inclined plane of the limiting parts (18) or be blocked by the limiting parts (18) according to the length of the screw, and the conversion parts of the lower tooth post (12) exceeding the inclined plane are driven to switch positions.

2. The screw length detection mechanism according to claim 1, wherein: the limiting piece (18) comprises a pair of first guide rod (13) and third guide rod (16) which are the same in preset stroke and a second guide rod (19), the preset stroke of the second guide rod (19) is larger than that of the first guide rod (13) and the third guide rod (16), and the third guide rod (19) is rotatably connected with the shell (9).

3. The screw length detection mechanism according to claim 2, wherein: the lower toothed column (12) comprises a first toothed column (20) and a second toothed column (21) which is in sliding connection with the first toothed column (20), the second toothed column (21) is abutted to the upper toothed column (10) before the first toothed column (20), a platform (25) for accommodating a third guide rod (19) to penetrate through is arranged on a conversion portion of the second toothed column (21), and the second guide rod (16) can be connected with an inclined surface of the third guide rod (19).

4. The screw length detection mechanism according to claim 1, wherein: the conveying mechanism comprises a rotary feeding table (4) and a lifting feeding table, wherein the rotary feeding table (4) is used for rotating feeding, a plurality of pneumatic clamping hands (5) for clamping and feeding are arranged on the rotary feeding table (4), and a pneumatic clamping arm (6) for grabbing and feeding is arranged on the lifting feeding table.

5. The screw length detection mechanism according to claim 1, wherein: clamping mechanism (7) include air chuck and press from both sides cover (11), air chuck is equipped with a plurality of jack catch (14), press from both sides cover (11) including a plurality of can splice form the separator that holds the screw and pass through, and the separator is connected with jack catch (14) dismantlement respectively.

6. The screw length detection mechanism according to any one of claims 1 to 5, wherein: receiving agencies includes planet carrier (3), carousel (2), a plurality of and carousel (2) rotate the planet teeth of a cogwheel (23) of being connected and install sun gear teeth (24) on carousel (2), install the storehouse of placing (1) that holds the screw on the planet teeth of a cogwheel (23), planet carrier (3) are through interior teeth of a cogwheel and planet teeth of a cogwheel (23) meshing.

Background

The screw is a part for fastening the parts of the object step by utilizing the physics and mathematical principles of the inclined plane circular rotation and the friction force of the object, and the screw is one of the fastening parts.

Present screw detects length and carries out manual detection mostly through the instrument like application number CN 201821103956.4's utility model patent, this scheme is fixed through the length that exposes to the standard screw, in order to guarantee measuring precision, and the mode that utilizes the screw to twist adjusts the length of examining a head standard screw, though above-mentioned scheme can detect the length of standard screw, nevertheless need the manual work to screw up the assembly and dismantle to the great screw of size model among the actual operation process, comparatively consuming time and power, and the standard screw after the measurement need carry out artifical screening nominal length and confirm the product grade, comparatively loaded down with trivial details and the error rate is high.

Disclosure of Invention

The present invention is directed to solving the above problems and providing a screw length detecting mechanism.

In order to achieve the purpose, the invention provides the following technical scheme: a screw length detection mechanism comprises a detection mechanism, a material receiving mechanism and a conveying mechanism for conveying a clamping screw to the detection mechanism, wherein the detection mechanism is provided with a clamping mechanism for accommodating the screw to pass through, the detection mechanism comprises a shell, an upper tooth post and a lower tooth post which are in sliding connection with the shell, the shell is provided with a pressure spring which is abutted against the lower tooth post, the shell is provided with a movable space for accommodating the lower tooth post to rotate, the shell is provided with a plurality of limiting parts for guiding the upper tooth post and the lower tooth post to slide up and down and blocking the lower tooth post to rotate, the lower tooth post is provided with a lower tooth surface, the upper tooth post is provided with an upper tooth surface which can be abutted against the lower tooth surface, the limiting parts are provided with inclined surfaces which are clamped with the lower tooth surface, the lower tooth post forms a plurality of conversion parts according to the distribution of the limiting parts, the conveying mechanism drives the screw to intermittently push the upper tooth post to abut against the lower tooth post, the upper tooth post is driven according to the length of the screw to exceed the inclined surfaces of the limiting parts or be blocked by the limiting parts, and drives the switching portion of the lower tooth post beyond the inclined plane to switch positions.

By adopting the technical scheme, the relative position of the conversion part in the detection mechanism is changed intermittently by driving the screw by the conveying mechanism, and the nominal length range of the screw is detected according to the position switching of the conversion part, so that the strength grade of the product is determined.

Preferably, the limiting member includes a pair of first and third guide rods and a second guide rod, the first and third guide rods having the same preset stroke, the preset stroke of the second guide rod is greater than that of the first and third guide rods, and the third guide rod is rotatably connected with the housing.

By adopting the technical scheme, the tolerance range is set by presetting different strokes.

Preferably, the lower tooth post comprises a first tooth post and a second tooth post connected with the first tooth post in a sliding manner, the second tooth post is abutted with the upper tooth post before the first tooth post, a platform for accommodating the third guide rod to pass through is arranged on the conversion part of the second tooth post, and the second guide rod can be jointed with the inclined surface of the third guide rod.

Through adopting above-mentioned technical scheme, realize not enough in the drive down the column gear pivoted screw with length through the inclined plane joint and can drive down the column gear and rotate to the realization resets.

Preferably, the conveying mechanism comprises a rotary feeding table and a lifting feeding table, the rotary feeding table is used for rotating feeding and is provided with a plurality of pneumatic clamping hands for clamping feeding, and the lifting feeding table is provided with a pneumatic clamping arm for grabbing feeding.

Through adopting above-mentioned technical scheme, reach autoloading's effect through setting up of pneumatic tong and pneumatic arm lock.

Preferably, the clamping mechanism comprises an air chuck and a clamping sleeve, the air chuck is provided with a plurality of clamping jaws, the clamping sleeve comprises a plurality of separating pieces which can be spliced to form a screw accommodating part, and the separating pieces are respectively detachably connected with the clamping jaws.

Through adopting above-mentioned technical scheme, can change the clamp cover of different sizes according to what different model screws.

Preferably, the material receiving mechanism comprises a planet carrier, a turntable, a plurality of planet gear teeth and sun gear teeth, wherein the planet gear teeth are rotatably connected with the turntable, the sun gear teeth are arranged on the turntable, a storage bin for accommodating screws is arranged on the planet gear teeth, and the planet carrier is meshed with the planet gear teeth through inner gear teeth.

By adopting the technical scheme, different placing storehouses are switched through the planetary transmission system, and are kept aligned to the jacket, so that the screws can directly enter the corresponding placing storehouses after being popped up.

Compared with the prior art, the invention has the beneficial effects that:

the relative position of the conversion part in the detection mechanism is changed intermittently by driving the screws through the conveying mechanism, and the nominal length range of the screws is detected according to the position switching of the conversion part, so that the strength grade of a product is determined, manual operation and screening are replaced by automation, the screening speed is improved, and the error rate is reduced.

Drawings

FIG. 1 is a first schematic structural diagram of a screw length detection mechanism;

FIG. 2 is a second schematic structural view of a screw length detection mechanism;

FIG. 3 is a schematic structural diagram of a conveying mechanism and a detecting mechanism;

FIG. 4 is an exploded view of the detection mechanism;

FIG. 5 is a first schematic structural diagram of the detecting mechanism, which is used for showing the initial state of the detecting mechanism;

FIG. 6 is a schematic structural diagram of a second detecting mechanism for showing the position of the converting portion of the lower tooth post and the first guide bar when the screw is long enough;

FIG. 7 is a third schematic structural view of the detecting mechanism; a positional relationship for expressing a platform of the second column gear shifting portion;

FIG. 8 is a fourth schematic structural view of the detecting mechanism; the position state of the third guide rod after the third guide rod is rotated and combined with the inclined plane of the second guide rod when the length of the screw is insufficient is represented;

fig. 9 is a schematic structural view of the receiving mechanism.

Reference numerals: 1. placing a library; 2. a turntable; 3. a planet carrier; 4. rotating the feeding table; 5. a pneumatic gripper; 6. a pneumatic clamping arm; 7. a clamping mechanism; 8. a detection mechanism; 9. a housing; 10. an upper toothed column; 11. a jacket; 12. a lower tooth column; 13. a first guide bar; 14. a claw; 15. an upper tooth surface; 16. a second guide bar; 17. a lower tooth surface; 18. a limiting member; 19. a third guide bar; 20. a first tooth post; 21. a second tooth post; 22. a pressure spring; 23. planetary gear teeth; 24. sun gear teeth; 25. a platform.

Detailed Description

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the designated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A screw length detection mechanism is disclosed, as shown in figures 1-9, comprising a detection mechanism 8, a material receiving mechanism and a conveying mechanism for clamping screws to be conveyed to the detection mechanism 8, wherein the detection mechanism 8 is provided with a clamping mechanism 7 for accommodating screws to pass through, the detection mechanism 8 comprises a shell 9, an upper tooth post 10 and a lower tooth post 12 which are connected with the shell 9 in a sliding manner, the shell 9 is provided with a pressure spring 22 which is abutted against the lower tooth post 12, the shell 9 is provided with a movable space for accommodating the lower tooth post 12 to rotate, the shell 9 is provided with a plurality of limiting parts 18 which guide the upper tooth post 10 and the lower tooth post 12 to slide up and down and block the lower tooth post 12 to rotate, the lower tooth post 12 is provided with a lower tooth surface 17, the upper tooth post 10 is provided with an upper tooth surface 15 which can be abutted against the lower tooth surface 17, the limiting parts 18 are provided with inclined surfaces which are clamped with the lower tooth surface 17, the lower tooth post 12 is distributed to form a plurality of conversion, the detection device is provided with a photoelectric detection device for monitoring the conversion part, the photoelectric detection device is electrically connected with the material receiving mechanism and the conveying mechanism, and the lower toothed column 12 is also connected with a counting device.

Wherein, conveying mechanism is including rotating the rotatory pay-off platform 4 and the lift pay-off platform of pay-off, and rotatory pay-off platform 4 is equipped with the pneumatic tong 5 of a plurality of centre gripping pay-offs, and the lift pay-off platform is equipped with the pneumatic arm lock 6 that snatchs the pay-off. When the conveying mechanism operates, the pneumatic clamping arm 6 translates to the position of the pneumatic clamping hand 5 to clamp the screw at the position, the pneumatic clamping hand 5 at the position is loosened, and the pneumatic clamping arm 6 conveys the screw to the clamping mechanism 7 of the detection mechanism 8.

Wherein, clamping mechanism 7 includes air chuck and presss from both sides cover 11, air chuck is equipped with a plurality of jack catch 14, it can amalgamate the separator that forms to hold the screw and pass through to press from both sides cover 11 and include a plurality of, jack catch 14 draws close along air chuck's center under the drive of air pump, make the separator on jack catch 14 draw close amalgamation and form the passageway that holds the screw and pass through, the inner wall of separator is handled through the rubber coating, make the screw can slide and pass through, and the separator is dismantled with jack catch 14 respectively and is connected, so can change not unidimensional clamp cover 11 according to what different model screws.

In the initial state, the lower rack 12 includes a first rack 20 and a second rack 21 slidably connected to the first rack 20, a transition portion of the first rack 20 is located between the first guide bar 13 and the second guide bar 16, a transition portion of the second rack 21 with the platform 25 is located between the second guide bar 16 and the third guide bar 19, and another transition portion of the second rack 21 is located between the third guide bar 19 and the first guide bar 13.

When the detection mechanism 8 operates, the pneumatic clamping arm 6 pushes a screw to pass through a channel of the jacket 11 according to a preset stroke value and pushes the upper toothed column 10 to press the lower toothed column 12, the limiting piece 18 comprises a pair of a first guide rod 13, a third guide rod 19 and a second guide rod 16 which have the same preset stroke, the preset stroke of the second guide rod 16 is larger than that of the first guide rod 13 and the third guide rod 19, the third guide rod 19 is rotatably connected with the shell 9, when the length of the screw reaches the preset length requirement of the first guide rod 13 and the third guide rod 19, the second toothed column 21 is abutted with the upper toothed column 10 before the first toothed column 20, the upper toothed column 10 slides along the limiting piece 18 and is firstly abutted with the second toothed column 21 to drive the second toothed column 21 to slide along the first toothed column 20, at the moment, a platform 25 on a conversion part of the second toothed column 21 slides together with the other conversion part, and when the upper toothed column 10 is abutted with the first toothed column 20, in the sliding process, the conversion parts of the first tooth post 20 and the second tooth post 21 slide to the inclined planes at the tail ends of the first guide rod 13 and the third guide rod 19, the first tooth post 20 and the second tooth post 21 rotate for a certain angle along the movable space under the action of radial force, so that the position of the conversion part of the first tooth post 20 and the second tooth post 21 is changed, at the moment, the pneumatic clamping arm 6 drives the screw to be separated from the butting with the upper tooth post 10, the first tooth post 20 and the second tooth post 21 bounce under the action of the pressure spring 22, the conversion part with the platform 25 on the second tooth post 21 after switching is changed to be between the third guide rod 19 and the first guide rod 13, the other conversion part on the second tooth post 21 is changed to be between the first guide rod 13 and the second guide rod 16, the conversion part on the first tooth post 20 is changed to be between the second guide rod 16 and the third guide rod 19, at the moment, the conversion part of the photoelectric detection device is changed, and the counting of the counting device is increased, at this time, it is stated that the length of the screw reaches the preset length, the pneumatic clamping arm 6 pushes the screw again to press the first tooth post 20 and the second tooth post 21, and two situations occur at this time;

the first condition is as follows: if the converted conversion part of the first tooth post 20 cannot exceed the inclined plane at the tail end of the second guide rod 16, it indicates that the length of the screw does not reach the requirement of the preset length of the second guide rod 16, the screw is within the preset tolerance level, at the same time, the photoelectric detection device monitors that the conversion part is not converted, and at the same time, the counting device counts more, at this time, the platform 25 of the conversion part on the second tooth post 21 can accommodate the third guide rod 19 to pass through, a motor or a cylinder can be adopted to drive the third guide rod 19 to rotate along the shell 9 to be close to the second guide rod 16, and the inclined planes of the second guide rod 16 and the third guide rod 19 are jointed, at this time, the converted conversion part of the first tooth post 20 can be rotated and converted between the first guide rod 13 and the second guide rod 16 under the action of radial force through the jointed inclined planes, at the same time, the photoelectric detection device monitors that the conversion part is converted, the counting device counts more, the conversion part of the first tooth post 20 is provided with a clearance groove for accommodating the rotation and resetting of the third guide rod 19, the third guide rod 19 is driven to reset through a motor or an air cylinder, the pneumatic clamping arm 6 is loosened at the moment, the upper tooth column 10 ejects the screw to the corresponding placing warehouse 1 of the material receiving mechanism under the action of the pressure spring 22, the detection device restores to the initial state, and the counting of the counting device returns to zero.

Case two: if the conversion part of the converted first tooth column 20 can exceed the inclined plane at the tail end of the second guide rod 16, the first tooth column 20 and the second tooth column 21 are converted and reset to the initial state, the pneumatic clamping arm 6 is loosened at the moment, the upper tooth column 10 springs the screws to the corresponding placing warehouse 1 of the material receiving mechanism under the action of the pressure spring 22, the detection device restores to the initial state, and the counting device counts and returns to zero.

If the length of the screw is not enough to drive the first tooth post 20 and the second tooth post 21 to exceed the inclined surfaces of the first guide rod 13 and the second guide rod 16, the length of the screw does not reach the preset length, at the moment, the photoelectric detection device monitors that the conversion part is not changed, meanwhile, the counting device does not increase the counting number, the pneumatic clamping arm 6 is loosened, and the upper tooth post 10 bounces the screw to the corresponding placing warehouse 1 of the material receiving mechanism under the action of the pressure spring 22;

thereby sieve out the screw of presetting tolerance grade, and receiving agencies includes planet carrier 3, carousel 2, a plurality of planet teeth 23 of a cogwheel that are connected and install the sun gear tooth 24 on carousel 2 with carousel 2 rotation, install the storehouse 1 of placing that holds the screw on the planet teeth 23, planet carrier 3 meshes with planet teeth 23 through the interior teeth of a cogwheel, it corresponds different product grades to place storehouse 1, sun teeth 24 drives carousel 2 and rotates under the drive of motor, the interior teeth of a cogwheel of planet carrier 3 then drives planet teeth 23 and drives the rotation, receiving agencies can drive according to counting device's count, make the storehouse 1 of placing of corresponding grade rotate to the position of aiming at jacket 11 and stop working, jack catch 14 and pneumatic arm lock 6 loosen simultaneously this moment, the screw is in this storehouse 1 of placing under the effect of pressure spring 22. And then the conveying mechanism operates to repeat the actions, and the product grades of the screws are screened into different placing storehouses 1 according to the nominal length.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.